Survival and/or Pure Strategy (same buld)
It looks like PS is the better way to go for armor sake...but if you want to be 4 mins faster, you can survival run it.
The North East is not supported by anything, it just holds up on its own, and does a great job. But every 3 or 4 waves maybe run by and repair the traps and auras.
Party: 2 TB monks, 2 Summoners with monk/huntress pets (1 each at hint 1 and 2)
Test Run Survival combat time 22:43
Total Mobs 14,902 = 655 kill/min
Test run PS combat time - 26:10
Total Mobs 18,623 = 710 kills/min